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velikii [3]
3 years ago
6

I have all way been bad at this stuff

Mathematics
2 answers:
notka56 [123]3 years ago
7 0
Don't worry about not being good at this. Its really random and you will never need to know this.
a) 13-(-3) = 16 subtration
13+3 = 16 addition
b) An example of this would be -2 and 3.
nlexa [21]3 years ago
5 0
A. Subtraction: 13 -(-3)=16
Addition: 13 +(-3)=10

B. 40*F and 45*F
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Lena has $2800 dollars in her account and makes automatic $700 monthly payments on a cell phone bill. Use a table to find when a
nataly862011 [7]

Answer:

Well you can't go thur a month because $700 by 12 months is $8400.

Step-by-step explanation:

700 x 12 = 8400

8400 - 2800 = -5600

So you would be negitative.

3 0
3 years ago
Read 2 more answers
The graph of the quadratic function y = ax^2 + bx + c is given.<br> Find a + b + c.
andrey2020 [161]

Answer:

\frac{145}{24}\approx 6***

Answers may vary depending on the person reading the graph.

It is hard to tell what they think crosses nicely.

For example, I decided that the graph crossed nicely at the following points:

(0,3)

(2,8)

(6,5)

Step-by-step explanation:

I see that the graph crosses at (0,3),(2,8), and (6,5).

The equation y=ax^2+bx+c tells us the y-intercept is c since when x=0 we have y=a(0)^2+b(0)+c=0+0+c=c.

The y-intercept for our graph is 3. Therefore, c=3.

So far we have the equation:

y=ax^2+bx+3.

Let's enter the other points creating a system of linear equations to solve:

8=a(2)^2+b(2)+3

5=a(6)^2+b(6)+3

Let's simplify:

8=4a+2b+3

5=36a+6b+3

Let's subtract 3 on both sides:

5=4a+2b

2=36a+6b

I choose to solve the system by elimination.

Let's multiply the top equation by -3:

-15=-12a-6b

2=36a+6b

Now adding the equations results in:

-13=24a

Divide both sides by 24:

\frac{-13}{24}=a

Now using one of the equations we can find b:

5=4a+2b with a=\frac{-13}{24}

5=4\frac{-13}{24}+2b

5=\frac{-13}{6}+2b

Add 13/6 on both sides:

5+\frac{13}{6}=2b

\frac{30+13}{6}=2b

\frac{43}{6}=2b

Divide both sides by 2:

\frac{43}{2(6)}=b

\frac{43}{12}=b

So we have the equation:

y=\frac{-13}{24}x^2+\frac{43}{12}+3

Let's evaluate a+b+c now:

\frac{-13}{24}+\frac{43}{12}+3

\frac{-13+86+72}{24}

\frac{73+72}{24}

\frac{145}{24}

4 0
3 years ago
Find the derivative of <br> y = 1/ (3x^3) with steps
Ganezh [65]

Answer:

- 9 {x}^{ - 4}

Step-by-step explanation:

y =  \frac{1}{ {3x}^{3} }  =  {3x}^{ - 3}

y =  <  - 3 \times 3 >  {x}^{ - 3 - 1}  \\  =  - 9 {x}^{ - 4}

6 0
2 years ago
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4 0
2 years ago
A plane is flying from Albuquerque new Mexico to Austin Texas so far it has flown 161 miles or 23% of the total distance of the
Karo-lina-s [1.5K]

Answer: 700 miles.

Step-by-step explanation:

1. You know that 23% of the total distance of the flight from Albuquerque New Mexico to Austin Texas is 161 miles.

2. Then, keeping that information on mind, you can calculate the total distance of the flight (which you call x) as following:

\frac{161miles}{23\%}=\frac{x}{100\%}

Solve for x. Then, you obtain that the result is:

x=\frac{161miles*100\%}{23\%}\\x=700miles

3 0
3 years ago
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